Controller with a user interface



The FIGURE is a front view of a controller with a user interface flat control panel, showing the claimed design.

The dotted broken lines showing portions of the user interface flat control panel, text and other elements in the FIGURE form no part of the claimed design. The dot-dash-dot broken lines in the FIGURE represent boundaries and form no part of the claimed design. 

CLAIM The ornamental design for a controller with a user interface, as shown and described. 